20092010JMRI JamesKoretsky KenCameron 1 2012-08-31 JK Initial version 1.1 2012-11-06 KSC Added basic aspect mappings BN Single searchlight signal As described in the October 1989 Burlington Northern Railroad Southern Region, Nebraska Division Timetable #2. In effect at 0001 Continental Mountain Time, Sunday October 29, 1989. Appearances for a single-searchlight signal head and or semaphore which are used in Automatic Block, CTC and Interlocking Systems. Provides an alternate Restricted Proceed appearance. Clear green Rule 230 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-1-high/rule-230.gif Approach yellow Rule 236 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-1-high/rule-236.gif Approach Medium flashyellow Rule 234 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-1-high/rule-234.gif Restricted Proceed flashred Rule 241 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-1-high/rule-241-c.gif Stop red Rule 242 ../../../resources/icons/smallschematics/aspects/BN-1989/SL-1-high/rule-242.gif Stop Stop Stop Approach Medium Restricted Proceed Approach Diverging Approach Approach Diverging Approach Medium Approach Medium Diverging Clear Approach Medium Approach Clear Approach Restricting Approach Approach Medium Clear Approach Diverging Clear Advance Approach Clear Clear Clear